[GUIDE] Activate VoWiFi / WLAN Call

der_Kief · Nov 24, 2018

First of all a BIG thanks to ed-gonzo
He made this possible

This is the instruction to activate VoWiFi / WLAN Call on the Poco F1
Its tested and verfied to work with EU ROM (Oreo , Pie and Q based) and german provider o2 (Telefonica)

Before you read on i want to make clear that I am not responsible for bricked devices !

Basic requirements are root rights to do this mod
Maybe latest 2020 Qualcomm Diag QD-Loader Windows 10 Drivers signed are needed for this to work.

!!! Before doing this Mod you should backup EFS-partition !!!

- download QPST tool and install
- enable USB debugging in Developer settings
- now either go to terminal app and type:

Code:

   su
   setprop sys.usb.config diag,serial_cdev,rmnet,adb

or
adb from PC

Code:

  adb shell
  su
  setprop sys.usb.config diag,serial_cdev,rmnet,adb

- connect Poco F1 with original USB cable to PC
- start PDC (from QPST tool) on PC
- Poco F1 should be recognized by PDC (if not install Qualcomm driver and check Device Manager)
- activate corresponding profile (in case of german o2 its DT_Greece)
- install VoLTE & VoWiFi Enabler Magisk module (optional) or activate setting with dialer code *#*#869434#*#*
- restart Poco F1
- Voila

der_Kief · Nov 24, 2018

FAQ:
Q: What are the requirements for VoWiFi
A: A provider resp. plan which includes VoWiFi

Q: How to know if VoWiFi is working ?
A: Put phone in airplane mode and reactivate WiFi only. If you are able to make a call then VoWiFi is working.

Q: Does this only work with MIUI ROM ?
A: No ... its reported to work also on Custom ROMs like LOS, crDroid ...

saski4711 · Nov 24, 2018

Thx for this guide! Have been waiting for this.

Does this work with custom ROM (LOS)?
in case of german o2 its DT_Greece? are you sure? german carrier and greece?

der_Kief · Nov 24, 2018

saski4711 said:
Does this work with custom ROM (LOS)?

in german forum there is a user who has it running.... but it seems that LOS has no icon for VoWiFi
But nlow ...

saski4711 said:
in case of german o2 its DT_Greece? are you sure? german carrier and greece?

yes indeed DT-Greece for german o2

I have it up and running ...

saski4711 · Nov 24, 2018

der_Kief said:
in german forum there is a user who has it running.... but it seems that LOS has no icon for VoWiFi
But nlow ...

yes indeed DT-Greece for german o2
I have it up and running ...

Ok thx will give it a shot as soon as I get access to a windoze PC :highfive:

saski4711 · Nov 26, 2018

Ok this definately didn't work on my Poco-f1 with latest LOS16 and 8.11.15 vendor/fw. Funny thing that VoLTE now seems to be gone (Device switches back to H+/E). Got it back by restoring efs. Has anyone else been successful with this running custom ROMs? Even without this "hack" I have been able to activate VoWIFI after 8.11.5 update but it didn't work so I guess this depends on FW version.

Two things - a little offtopic though: Any Idea if this can be tried on the MiA1? I suspect that xiaomi doesn't include support in it's firmware for this device at all and I 'm afraid to cripple both my devices (Poco and MiA1) at the end

.
Has anyone had success getting HDVoice with BT headsets on the Poco-f1 with custom ROMs? Sorry for asking this here but in the LOS thread I seem to get ignored with this question / bug report.

der_Kief · Nov 26, 2018

@saski4711
to bad that its not working for you.
It defintively works with EU ROMs based on Oreo or Pie.

der_Kief · Nov 26, 2018

Double post
*deleted*

saski4711 · Nov 26, 2018

der_Kief said:
@saski4711
to bad that its not working for you.
It defintively works with EU ROMs based on Oreo or Pie.

Yeah bummer. Will give it another shot the next days maybe I messed up somewhere. Isn't this device supposed to get VoWIFI by default with the Pie update anyway? Maybe this will work OOTB with final pie?

Dilesh Perera · Nov 26, 2018

not works with EU pie rom to me too. from Sri Lanka we have VOWIFI network. tried switching many profiles but not works .

der_Kief · Nov 26, 2018

saski4711 said:
Isn't this device supposed to get VoWIFI by default with the Pie update anyway?

Dont know ... i'm on Stable EU ROM 10.0.6.0 (based on Oreo)

sanjay0501 · Nov 26, 2018

I know for sure it worked out of the box after pie update on stock beta with a service provider in Greece.
Can make settings appear with *#"#vowifi#*#* but being in India don't think providers support vowifi so doesn't work.

der_Kief · Nov 26, 2018

sanjay0501 said:
I know for sure it worked out of the box after pie update on stock beta with a service provider in Greece.
Can make settings appear with *#"#vowifi#*#* but being in India don't think providers support vowifi so doesn't work.

How can you be sure then?
Enabling the VoWiFi option doesnt mean its working !

sanjay0501 · Nov 27, 2018

der_Kief said:
How can you be sure then?
Enabling the VoWiFi option doesnt mean its working !

2 diff statement.
Can enable with code but doesn't work in india.
It worked for a friend in Greece without doing anything immediately after pie update.

What I was suggesting that maybe and just maybe if provider supports it ,vowifi can be enabled simply by code.

SatBandit · Nov 28, 2018

It is working perfect. I did some test calls on wifi. Thumb up..... BTW I'm on German Telekom D1

der_Kief · Nov 28, 2018

SatBandit said:
It is working perfect. I did some test calls on wifi. Thumb up..... BTW I'm on German Telekom D1

could you please tell us which ROM you are using and which profile you activated within PDC ?

SatBandit · Nov 28, 2018

I'm using 8.11.27 global beta and I modified the DT_greece section. Set sub0 and sub1 to active.
Opened dialer and dialed *#*#vowifi#*#*

gwolfu · Dec 7, 2018

ok this works, just needed a bit more work for WoWiFi in my case
after a reboot it kept returning to my default carrier config (VoLTE working just fine anyway)
so what I did was to remove my carrier config from within PDC Tool, just that by doing that it defaulted to a non-VoLTE config
well, removed that also and this time it kept DT_Greece config on both subs
VoLTE works and VoWiFi also

(carrier Orange Romania)

ps. don't restart phone if you want to test new configs
just click on activate and enter airplane mode then exit (keeps testing faster)

noobtoob · Dec 8, 2018

I've gotten as far as I can with my Mi Mix 2S, works on both AOSP and MIUI to allow the radios to be enabled, and the settings to appear in MIUI (AOSP usually shows them anyway).

With this said, I tried only enabling the WiFi option on the carrier that already had the sim activated...

I see many people here on different carriers in the EU who enabled the DT_Greece options and voila. Is this an accurate conclusion? I'm wondering if I just need an answer from a carrier other than my own to acknowledge the WiFi option exists to turn it on? Being in the US it seems as if the DT_Greece config could cause some problems, but it's not an option in my list. I don't know at this point.

Edit:
Tried all the US bands and even a few others, specifically ones that said WiFi. None worked so far, I'm going to cry! :crying::crying::crying:

Mario223 · Dec 22, 2018

I tried this on a Redmi Note 5 Pro but after selecting the device in PDC it throws an error message and doesn't show the list of carriers.
I've tried QPST 2.7.420 and 2.7.474 and a couple different pie roms, windows 7 and 10 but it always fails.
I can use EFS Explorer and dump the NV data just fine though...

[GUIDE] Activate VoWiFi / WLAN Call

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